@excellens/markdown-notepad/src/MarkdownNotepad/Component/Tab.js

A simple but extensible markdown editor based on @excellens/elementary.

/*
 * MIT License
 * Copyright (c) 2020 Excellens
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import * as Elementary from '@excellens/elementary'

export function Tab(document, element, state) {
    const self = (function (document, element, state) {
        const presenter = new TabPresenter(state);
        return new Elementary.Component.Component(presenter, document, 'div', element);
    }(document, element, state || new TabState()));
    const parent = {
        initialize: self.initialize,
        destroy: self.destroy,
    };

    let eventClick = null;

    this.initialize = function () {
        parent.initialize();

        self.addEventListener('click', eventClick = function (event) {
            self.presenter.changeActive(true);
        });

        return this;
    };

    this.setActive = function (active) {
        self.classList.toggle('active', active);

        return this;
    };

    this.destroy = function () {
        parent.destroy();

        self.removeEventListener('click', eventClick);
        eventClick = null;

        return this;
    };

    return Elementary.Base.Merge(this, self);
}

export function TabPresenter(state) {
    const self = new Elementary.Component.ComponentPresenter(state);
    const parent = {
        initialize: self.initialize,
        destroy: self.destroy,
    };

    this.update = function (state, id) {
        self.component.setActive(state.isActive());

        if (state.hasPane()) {
            let paneState = state.getPane();
            paneState.setActive(state.isActive());
            paneState.notify();
        }
    };

    this.changeActive = function (active) {
        self.state.setActive(active);
        self.state.notify();

        return this;
    };

    return Elementary.Base.Merge(this, self);
}

export function TabState() {
    const self = new Elementary.Component.ComponentState();

    this.name = 'tab';

    this.getName = function () {
        return this.name;
    };
    this.setName = function (name) {
        this.name = name;
        return this;
    };

    this.active = false;

    this.isActive = function () {
        return this.active;
    };
    this.setActive = function (active) {
        this.active = active;
        return this;
    };

    this.pane = null;

    this.getPane = function () {
        return this.pane;
    };
    this.setPane = function (pane) {
        this.pane = pane;
        return this;
    };
    this.hasPane = function () {
        return !!this.pane;
    };

    return Elementary.Base.Merge(this, self);
}